Fishing tool



Feb. 10, 1931.

C. H. BROWN FISHING TOOL Filed May 1-1, 1928 i: i a

as as- G '5) 0 If, I.

Patented Feb. 10, H931 UNITED "STATES,

PATENT OFFICE],

CHARLES HENRY BROWN, or BRECKENRIDGE, TEXAS FISHING TOOL Application filed May 11, 1928. Serial No. 277,083.

This invention relates to in'iprovementsin fishing tools for oil wells and the likeran'd particularly to improvements on Patent Number1,526,412 granted to me on Febru 5 ary 17, 1925. g p p The object of this invention is the addition of certain novel features to those contained in Patent Number 1,526,412 in which the construction is much simplified and means 10 s'prov1dedwhereby repairs may more read-' shaft supports it by suspending the; weight 7 of the drill stem or drill pipe by taking the weight in tension of its loWer'en'd,

greatly simplified and lower'cost of manufacture.

This invention will be best understood from a consideration of the following detailed description, in connection with theaccompanying drawings, nevertheless. it is to be'understood that the invention is not con fined to the disclosure being susceptible'of jsuch changesand modifications as shall de- "fineno material departure fronivthe salient features of the invention as expressed in r the appended claims.

In the drawings v I Figure 1 is a partial sectional view ofthe invention as is now being presented. Figure 2 is a partial sectional view of one form of the invention as was shown in Patent Number 1,526,412 of February 17, 1925, in which parts corresponding to ones in Figure 1 are numbered the same but carry the index I).

Figure 3 is a top view of clamping and guide plate 4. i

Figure 4 is a sectional view of the clamping assembly as indicated by the line AB in Figure l. r

Another object is to provide a tool of Figures 5 and 6 arerespectivelya bottom and top view of clamping sleeve Figure 7 is atop view of the mandrel plate 10 with its gussets 11. I

Referr1ng to the drawings wherein for the sake of illustration is shown the pro-- ferred embodiment of the invention, the

numeral 1 designates the "body or tubular housing with itsthreaded connectio'nifiO, for attaching to a drilling stem and nochaiige is made from that used with PatentNumber The numeral 2 indicates the central lman drel shaft (or tube) towhichis attached the fingerassembly of the tool and which suspends that assembly in the tube bymeans of the partition 'lg'an'd nut 14 which is end. In Paterit'Nunrthreaded onto its top ber 1,526,412 this mandrel had the fingers, attached solidly'to itwhereas'in this application it carries the spider 5 which is rigidly fastened to it" and the "fingers 8 havehoolrs 15, that catch over the top end of thespiderand are clamped) it y. eans oft-heelainping P @1 mping sleeveG andzb lr 7etc'. 1

The compression spring fi prevents the tool 1 V e samea's used inPatenti Number 1,526,412. I L 1 The clamping and guide plate 4, the spider 5, the clamping sleeve G and thelbolts 11, 11",

11, 1-1',l'for'm'the means '(after the spider '5 .hasbeen' welded or otherwise securely attached to the mandrel) of assembling the several fingers 8, .8, 8, etc. to the mandrel 1 which construction is new 111' this-invention;

The closing plate 9 serves to close the fingers together by being forced down over:

their slanted portions weight' being ap 'froin closing until it hasreceived suflicient wveight to make it sink nto the mud or reach; bottom and is t plied to the body"1.- This action is the same 7 as in Patent Number 1,526,412.v

' The mandrel plate 1O whichaflords abase for closing'the tool on top of objects being fished or on cavings, when the/ fingers cannot reach bottomand'also' serves as a guide} to hold'the fingers in regular spacing while being closed is the same as used in Patent Number 1,526,412texcept that ha's gussets 2. These gussets form the double means of bracing the mandrel plate 10 and of being a stop for the closing ring 9 when it hasbeen pushed to its lowest position asshown by the dotted lines. By having the weight of and upon the descending body 1, supported by the closing ring 9 coming to rest on the gussets the top ofmandrel shaft is'p'revented from bumping against the-connection 20 and the shaft is not bent or its top upsetas the lengths are so fixed that a space 16 mandrel whereas in Patent Number 1,525. n2 the mandrel shaft 2?) as shown in Figure 2 bumped the connection 20?) as shown at 1T.

, In Figures 1 and 2 each have a finger left off in front to better show the construction. The method of closing the tools is shown by the dotted lines in Figurel below the section of the tube 1 and the dotting in of the'closing ring and two fingers in each case.

The; asse1nbly "oftl1e fingers on the mandrel, formerly, was, as has been stated, by welding the fingers 9?) rigidly to the mandrel with a guide ring 15 also welded on. In the present case the spider 5 is welded or otherwise rigidly attached to the mandrel 2-,

' the clamping sleeve 6 and the closing plate 8 are slid on to the mandrel and the mandrel plate 10'with its gussets are fastened on to the mandrel 2. The several fingers are en'- tered thru the closing plate 9 and clamping sleeve 6, one at a time and hooked over the top of the spider 5.. The bolts 11, are then inserted thru, the clamping plated, passing thru the clearance space 18 and sleeve 6. The bolts pull theplate 1 against the hooks .on the fingers and the sleeve 6 against their slanted portion 21 and as the fingers are each resting in the grooves 22 in the spider 5 and grooves 23 in the sleeve 6 they are held solidly and in alignment and; that in case of a'broken finger it can be removed and another finger attached with the use. of ordinary wrenches. Also that if an object is of such size or shape or in such a position that one or'morefingers need to be left off in order tomore' readily fish the job that can be done Whereas in the Patent Number 1,526,412 the tool would require being taken to a shop for such repai oralteration. V v p It will'also be seen that the fingers could 1 be assembled rigidly enough for fishing most objects by making them without the hooks 15 and clamping them by their slantedportion 21 only. I 1

I am acquainted with the 'fact that many fishing tools. having demountable features have heretofore been made and therefore do.

not claim that feature broadly but only in the mannershown or mentioned therefore, I claim:

1. Improvements in a fishing tool, abarrel,

a connection at the upper end of the barrel, a mandrel slidably mounted in the barrel, said mandrel carrying a set of flexible steel fingers with inwardly hooked and downward and inward slanted top ends which are assembled on the mandrel by a spider rigidly attached to the mandrel, a clamping plate resting on top of the hooked ends of the fingers and causing the hook on each finger to engage the top of the spider, a clamping sleeve that is pulled up on the slanted portions of the fingers, clamping the fingers securely in position, means for closing the between the connection and the top of the fingers together at the bottom and holding themclosed. r

2. A fishing tool having a central mandrel upon which flexible fingers are assembled and having a mandrel plate at its bottom with gussets attached that brace the mandrel plate and actas a stop to the closing plate I when it reaches the lowest desired point.

3. A fishing tool having flexible fingers removablyattached to a central member in such a way that one or more fingersmay be removed and the others used to fish irregularly shaped objects lying in difiicult positions.

Signed at Breckenridge in the county of StephensfandState of Texas this 8th day of May, A. D. 1928;

' CHARLES HENRY BROWN. 

